<html>
  <head>
      <?php http_response_code( 500 ); ?>
  </head>
  <body>
    <p>aargh</p>
    <a href='https://httpstat.us/200'>Link 1</a>
    <a href='https://httpstat.us/300'>Link 2</a>
    <a href='https://www.google.com/'>Link 3</a>
  </body>
</html>
